Free Preparation Discussions
MENU
Cisco Exam 100-490 Topic 4 Question 50 Discussion
Topic #: 4
To which value is the configuration register changed to bypass the loading of the startup configuration when performing a password recovery on a Cisco device?
The configuration register on Cisco devices controls how the device boots up. By changing the configuration register to 0x2142, you instruct the router to bypass the startup configuration file stored in NVRAM. This is crucial in the password recovery process because the passwords are stored in this configuration file.
Procedure for Password Recovery:
1. Break the boot sequence: Power cycle the router (turn off/on). During the boot process, send a 'Break' signal to get into ROMmon mode.
2. Change the configuration register: In ROMmon mode, type confreg 0x2142 and reload the router.
3. Boot without startup-config: The router will boot up, ignoring the saved startup configuration, allowing you to enter privileged EXEC mode without a password.
4. Change the password: Access configuration mode (configure terminal), and change the passwords as needed (enable password, enable secret, etc.).
5. Reset the configuration register: Set the configuration register back to its original value (usually 0x2102).
6. Save changes: Save the new configuration with copy running-config startup-config.
Denise
11 months agoFiliberto
10 months agoKallie
10 months agoAnnita
10 months agoThomasena
11 months agoGearldine
11 months agoFelicidad
11 months agoJose
9 months agoStefania
9 months agoJessenia
9 months agoSherita
9 months agoFletcher
9 months agoEun
9 months agoMyrtie
9 months agoLouisa
9 months agoGwenn
10 months agoAllene
10 months agoNancey
11 months agoLavera
11 months agoBrunilda
11 months agoCharolette
12 months agoVincenza
11 months agoAlexis
11 months agoMarti
11 months agoMargret
11 months agoJesusita
12 months agoTiera
11 months agoGoldie
11 months agoElvera
12 months agoSusy
12 months agoAshley
12 months ago